Eclipse notes

1
Eclipse notes

• Future, present past eclipses

2
Solar Eclipses

• First documented
• Chinese 4,000 yrs. ago.
• How possible?
• sun is 400x bigger than moon
• moon is 400x closer to earth
• result?
• they look the same size

3
Total Solar Eclipse

• Total eclipse

4
Total Solar Eclipse

• Total eclipse

• A. Total
• All of Suns photosphere is blocked out.
• Where can you see this?
• People in the moons umbra can see a total.
• 1. When they occur
• every 2 3 years somewhere on Earth.
• once every 360 yrs. at any given point

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Total Solar Eclipse

• Total eclipse

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Total Solar Eclipse (2)

• Total eclipse

• 2. Path of shadow
• usually less then 100 mi. wide
• 3. Time of totality
• usually 2 -3 min.
• never more then 7 min.
• 4. Next one from USA
• August 17, 2017 (partial from Pittsburgh)

7
Total Solar Eclipse 2006

• Total eclipse

8
Total Solar Eclipse (3)

• Total eclipse

• Total eclipses will become extinct. Why
• Moon is receding from Earth at a rate of 1
  inch/year.
• In a billion years, the moon will be too far away
• It will be too far away for what?

9
Partial Solar Eclipse

• Total eclipse

• B. Partial
• Only part of the photosphere is darkened.
• Where can you view this?
• People in the penumbra

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Partial Solar Eclipse

• Total eclipse

• C. Annular
• Only the center of the photoshpere is darkened

11
Annular Solar Eclipse

• Total eclipse

12
Partial Solar Eclipse

• Total eclipse

• Perigee
• Position of moon nearest to Earth
• Apogee
• Position of moon farthest from Earth

13
Solar Eclipse

• Total eclipse

14
Partial Solar Eclipse

• Total eclipse

• At what position can annular solar eclipse occur?
• Apogee
• Position of moon farthest from Earth

15
Solar Eclipse
symbol for Earth
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Solar Eclipse Sequence
17
Annular Solar Eclipses
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Annular Solar Eclipse
Apogee
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Rare Annular Solar Eclipse
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Lunar Eclipses
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Total Lunar Eclipse
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Lunar Eclipse Sequence